>Unless these emmission taxes are calibrated to the cost of climate change then this argument is missing the point.
The stated policy goal in part is to reduce emissions to met climate targets to fight climate change, so yes.
>You seem to want to argue that subsidizing a business and not taxing them on an externality is somehow morally the same thing
It is.
>but it doesn't mean that they are factually the same thing.
First of all, the meaning of words and political concepts are never factual.
But I'd still argue that at a high level they are the same, and both are subsidies. In both cases the government refuses money it would otherwise collect from different parties, thereby gifting those entities value you can put a price tag on.
Those decisions are active decisions NOT to do something (while doing something about the same thing or very similar things when it comes to other parts of the population), at least at this point.
The only distinction I'd make is between direct subsidies (the government forks over money) and indirect/implicit subsidies (the government decides not to make certain entities pay for certain things for which other entities have to pay the government).